The eternal inflation model says that there ’s an infinite number of universes , with fresh universe incessantly popping into creation and spread out outwards . Every so often , these raw universes might jar . Our universe has four “ contusion ” peradventure stimulate by these collisions .
We ’ve already find possible evidence ofa creation before the Big Bangin the cosmic microwave background signal , so why not other world ? This particular hypothesis comes out of a model fuck as eternal inflation , which suggests universes are constantly pop up and expanding throughout the huge , unthinkably countless cosmos .
https://kotaku.com/have-we-found-the-universe-that-existed-before-the-big-5694701
We know our universe undergo its own inflationary full stop just after the Big Bang , carve out our own footling field of the cosmos . The idea is that , as creation kill into existence around each other and start to expand , the distance between them also spread out at a somewhat faster rate , maintain the world forever separate . But it is n’t actually required that the blank space between expands faster than the universe , and that opens up the possibility of integral universes colliding into each other , the victims of runaway elaboration .
Such a collision would release monolithic bursts of energy into both universe . As long as the collision pass while our own universe was still inflating , then there would be telltale artifacts leave behind in the cosmic microwave oven background . fundamentally , the collision would cause inflation to proceed unevenly in that part of the universe – if it lasted longer than elsewhere , that part of the CMB would be cooler , while it would be warmer if the collision caused inflation to terminate sooner .
stargazer have now constitute at least four possible “ contusion ” leave behind by other existence colliding into our own . These four massive cold spots in the CMB ca n’t really be explained if ours is the only population , as there ’s nothing we know of in our universe that could make these blot .
Still , the absence of alternative possibility is n’t by itself proof of other universes . However , there actually are way to confirm the theory , such as the orientation of the photons shit up that portion of the CMB . The European Space Agency ’s Planck orbiter should be able to foot up on the polarisation of the photons and possibly prove or confute the theory . Its first maps are due in 2012 .
Even if we ca n’t recover conclusive proof for most of the nominee , corroborate even one spot as an artifact of a collision with another population would be a massively important finding , providing crucial living for theory that swear on the existence of a multiverse . It might also completely put down our sense of perspective once and for all , to detect out we really are just in one of an infinite regalia of universes .
[ arXivviaNew Scientist ]
AstronomyAstrophysicscosmosPhysicsScienceSpace
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